CN219673383U

CN219673383U - Pneumatic control valve

Info

Publication number: CN219673383U
Application number: CN202321013005.9U
Authority: CN
Inventors: 钟神龙; 李平
Original assignee: Ningbo Xusheng Group Co ltd
Current assignee: Ningbo Xusheng Group Co ltd
Priority date: 2023-04-27
Filing date: 2023-04-27
Publication date: 2023-09-12
Anticipated expiration: 2033-04-27

Abstract

The utility model provides a pneumatic control valve, which comprises a base, wherein the right end of the base is provided with an air inlet channel connected with an air supply source of an airtight detection instrument, the front end of the base is provided with an air outlet channel for exhausting the pneumatic control valve and a first air outlet channel, a second air outlet channel and a third air outlet channel which are communicated with three workpieces to be detected in sequence at equal intervals, the upper end of the base is provided with four control valves capable of independently controlling the air inflation of the workpieces to be detected in equal intervals, four cavities are formed between the lower ends of the four control valves and the base, the lower ends of the four cavities are respectively communicated with one end of the air inlet channel, and the front ends of the four control valves are sequentially communicated with one ends of the air outlet channel, the first air outlet channel, the second air outlet channel and the third air outlet channel. Compared with the prior art, the utility model has the advantages that: the air control valve can realize that gas can nondestructively detect the tightness of the workpiece to be detected, and can switch different cavities through the control valve to respectively detect the air tightness of the three workpieces to be detected, so that the working efficiency of the air tightness detection system is improved.

Description

Pneumatic control valve

Technical Field

The utility model relates to the technical field of air tightness detection equipment, in particular to a pneumatic control valve.

Background

Along with the continuous development of social economy, various devices and instruments are continuously innovated, and some instruments or parts of the devices need good air tightness, so that the air tightness of the instruments or parts of the devices before delivery is detected, the traditional air tightness detection device adopts a water detection method to detect the air tightness of container parts, namely, a product is immersed in water, whether water inflow exists in the product or not is taken as a judgment standard, but the detection mode has the following defects: 1. the electronic products can possibly cause damage to the parts of the electronic products due to water inflow by adopting a water detection method; 2. the water detection method needs repeated disassembly and assembly and re-verification, and has low detection efficiency; 3. the judgment standard of the water detection method depends on manual judgment and lacks of the stringency.

Therefore, in the prior art, an air tightness detection method is improved, for example, in chinese utility model 'an air tightness detection tool and an air tightness detection system' with patent number ZL201920994835.1 (grant publication number CN 209979149U), the air tightness detection system controls an air control valve to charge an air cylinder through an electromagnetic valve, so that a piston rod of the air cylinder controls a connecting cylinder to press a breather valve on a shell of a workpiece to be detected, and meanwhile, the connecting cylinder is connected with an air tightness detection device through a hose, the air tightness detection device charges air into the shell of the workpiece to be detected through the breather valve through the connecting cylinder, the air tightness detection is performed on the workpiece to be detected, and the air tightness detection device judges whether the tightness of the workpiece meets the requirement according to the change of the internal pressure of a channel. The airtight detection system can be used for nondestructively detecting whether the sealing of the workpiece meets the requirement.

At present, in general, an airtight detection system is adopted in industrial production, and the design of an air control valve in the airtight detection system is typically as described in the patent, and a workpiece to be detected is communicated with an air supply source through the air control valve, but in the detection process of the airtight detection system, the air control valve in the airtight detection system is only provided with one test port, and the airtight detection system can only detect one workpiece to be detected at a time, so that the problem of lower working efficiency of the airtight detection system is caused, and further improvement is needed.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a pneumatic control valve which can be used for nondestructively detecting a workpiece to be detected and can be used for improving the working efficiency of an airtight detection system.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a pneumatic control valve, includes the base, the base right-hand member is equipped with the inlet channel who is connected with airtight detecting instrument air feed source, the base front end equidistance is equipped with in proper order and is used for the exhaust passageway of pneumatic control valve and with the first passageway of giving vent to anger, second passageway and the third passageway of giving vent to anger of three work piece intercommunication that awaits measuring, correspondingly, four can be independently controlled for the gaseous control valve of work piece that awaits measuring are installed to the base upper end equidistance, four the lower extreme of control valve with be formed with four cavitys between the base, four the lower extreme of cavity respectively with the one end intercommunication of inlet channel, thereby inlet channel aerifys the cavity, four the front end of cavity in proper order with the one end intercommunication of exhaust channel, first passageway, second passageway and third passageway of giving vent to anger, thereby make gas in the cavity discharges or discharges to the work piece that awaits measuring.

In order to enable the control valve to independently control the inflation of the workpiece to be tested, preferably, the control valve comprises an air cylinder, a valve body, a piston rod, a blocking head and a fixing piece, wherein the valve body is positioned at the lower side of the air cylinder and fixed on the base, the piston rod is positioned in the valve body and connected with the driving end of the air cylinder, the blocking head is used for blocking the air inlet channel, and the fixing piece is used for linking the piston rod with the blocking head. The control valve is connected with the blocking head through the cylinder control piston rod to vertically move, and the blocking head can block the air inlet channel below the upper cavity, so that the control valve can control whether to inflate a workpiece to be detected or not, and air tightness detection is performed.

In order to make the shutoff head of control valve to the shutoff effect of air inlet channel better, preferably, the outward flange of air inlet channel and four the one end that the cavity communicates is protruding in the upper end of base, the outward flange is located under the shutoff head, the bellied outward flange of one end that the shutoff head can be better extrusion air inlet channel and four cavities communicate.

In order to realize the sealing between the valve body and the piston rod in the cavity, preferably, a first sealing structure is arranged between the valve body and the piston rod, the first sealing structure comprises a first sealing ring for sealing a space between the valve body and the piston rod and a first annular groove arranged on the outer surface of the piston rod and used for placing the first sealing ring, and the valve body and the first annular groove are clamped in a bidirectional manner.

In order to realize the sealing between the valve body and the base in the cavity, preferably, a second sealing structure is arranged between the lower end of the valve body and the base, the second sealing structure comprises a second sealing ring for sealing the space between the valve body and the base and a second annular groove arranged at the lower end of the valve body for placing the second sealing ring, and the valve body and the base are clamped in a bidirectional manner to the second sealing ring.

In order to prevent the mounting that is connected with the piston rod from droing, still be equipped with on the mounting and be used for the upper end of mounting presss from both sides tightly the third sealing washer of piston rod and can place the third annular groove of third sealing washer, third sealing washer makes mounting upper end press from both sides tight piston rod lower extreme to realize that the piston rod drives the shutoff head and do vertical motion.

Compared with the prior art, the utility model has the advantages that: the four control valves are utilized to independently control whether the air inlet channel can charge air into the cavity, one ends of the air outlet channel, the first air outlet channel, the second air outlet channel and the third air outlet channel are communicated with the cavity, the other ends of the air outlet channel, the air source and the workpiece to be detected are communicated, the air source passes through the cavity communicated by the air inlet channel and is respectively discharged into the three workpieces to be detected through the three air outlet channels, the air tightness detection is carried out on the workpieces to be detected through the air tightness detection device connected with the workpieces to be detected, the tightness of the workpieces to be detected is detected in a gas nondestructive mode, the air tightness detection is carried out on the three workpieces to be detected through the control valves by switching different cavities, and the working efficiency of the air tightness detection system is improved.

Drawings

FIG. 1 is a schematic perspective view of a pneumatic control valve according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of the front view of a pneumatic control valve according to an embodiment of the present utility model;

FIG. 3 is a schematic top view of a pneumatic control valve according to an embodiment of the present utility model;

FIG. 4 is a schematic cross-sectional view of A-A of FIG. 2;

FIG. 5 is a schematic cross-sectional view of B-B of FIG. 3;

fig. 6 is a partial enlarged view at fig. 5C.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

As shown in fig. 1-6, is a preferred embodiment of the present utility model. The pneumatic control valve of this embodiment is including base 1, base 1 right-hand member is equipped with the air inlet channel 2 that is connected with airtight detecting instrument air feed source, base 1 front end equidistance is equipped with in proper order and is used for the exhaust passageway 3 of pneumatic control valve and with the first passageway 4 of giving vent to anger of three work piece intercommunication that awaits measuring, second passageway 5 and third passageway 6 give vent to anger, correspondingly, four control valves 7 that can independently control the work piece of awaiting measuring are installed to base 1 upper end equidistance, be formed with four cavitys 8 between the lower extreme of four control valves 7 and base 1, the lower extreme of four cavitys 8 communicates with the one end of air inlet channel 2 respectively, thereby air inlet channel 2 aerifys cavity 8, the front end of four cavitys 8 communicates with the one end of air outlet channel 3, first passageway 4, second passageway 5 and third passageway 6 give vent to anger in proper order, thereby make the gas in the cavity 8 discharge or exhaust to the work piece that awaits measuring.

As shown in fig. 4-6, the control valve 7 of the present embodiment includes a cylinder 71, a valve body 72 located at the lower side of the cylinder 71 and fixed on the base 1, a piston rod 73 located in the valve body 72 and connected with the driving end of the cylinder 71, a blocking head 74 for blocking the air intake channel 2, and a fixing member 75 for linking the piston rod 73 with the blocking head 74, wherein a third sealing ring 751 for clamping the upper end of the fixing member 75 to the piston rod 73 and a third annular groove 752 capable of placing the third sealing ring 751 are further provided on the fixing member 75, and the upper end of the fixing member 75 is clamped to the lower end of the piston rod 73 by the third sealing ring 752, so that the piston rod 73 drives the blocking head 74 to perform vertical movement. In addition, an outer edge 21 of one end of the air intake passage 2 communicating with the four cavities 8 protrudes from the upper end of the base 1, and the outer edge 21 is located directly below the blocking head 74. The control valve 7 is connected with the blocking head 74 through the cylinder 71 to vertically move, the blocking head 74 can squeeze the air inlet channel 2 to be communicated with the cavity, and the outer edge 21 at one end of the air inlet channel is protruded, so that the air inlet channel 2 in the upper cavity 8 can be better blocked, and the control valve 7 can control whether to inflate a workpiece to be detected or not, and air tightness detection is performed.

As shown in fig. 5 and 6, a first sealing structure 76 is disposed between the valve body 72 and the piston rod 73, the first sealing structure 76 includes a first sealing ring 761 for sealing a space between the valve body 72 and the piston rod 73, and a first annular groove 762 disposed on an outer surface of the piston rod 73 for placing the first sealing ring 761, and the valve body 72 and the first annular groove 762 bidirectionally clamp the first sealing ring 761. In addition, a second sealing structure 77 is disposed between the lower end of the valve body 72 and the base 1, the second sealing structure 77 includes a second sealing ring 771 for sealing a space between the valve body 72 and the base 1, and a second annular groove 772 disposed at the lower end of the valve body 72 for placing the second sealing ring 771, and the valve body 72 and the base 1 bidirectionally clamp the second sealing ring 771.

In summary, the specific working process of the embodiment of the pneumatic control valve provided by the utility model comprises the following steps:

A. the air inlet channel 2 is communicated with an air supply source, the three air outlet channels are communicated with the test ports of three workpieces to be tested, the control valves 7 positioned above the air outlet channel 3, the second air outlet channel 5 and the third air outlet channel 6 are used for blocking the air inlet channel 2 in the corresponding cavity, air enters the cavity 8 through the air inlet channel 2 and is discharged into the workpieces to be tested through the first air outlet channel 4, whether air leakage is detected by the air tightness detection device connected with the workpieces to be tested, and therefore the air tightness of the first workpiece to be tested is judged;

B. after the first workpiece to be detected is detected, the air supply source stops air inlet, and the control valve 7 positioned above the first air outlet channel 4, the second air outlet channel 5 and the third air outlet channel 6 seals the air inlet channel 2 in the corresponding cavity, so that the air in the air control valve 7 is discharged through the air outlet channel 3;

C. the air tightness detection of the second and third workpieces to be detected is operated repeatedly according to the above sequence, so that the air tightness of the second and third workpieces to be detected is tested.

Claims

1. Pneumatic control valve, including base (1), its characterized in that: the gas-tight detection device comprises a base (1), wherein the right end of the base (1) is provided with a gas inlet channel (2) connected with a gas supply source of a gas-tight detection instrument, the front end of the base is provided with a gas outlet channel (3) for exhausting gas by a gas control valve and a first gas outlet channel (4), a second gas outlet channel (5) and a third gas outlet channel (6) which are communicated with three workpieces to be detected in sequence at equal intervals, correspondingly, the upper end of the base (1) is provided with four control valves (7) capable of independently controlling the gas inlet of the workpieces to be detected, four cavities (8) are formed between the lower end of the control valves (7) and the base (1), the lower ends of the cavities (8) are respectively communicated with one end of the gas inlet channel (2), so that the gas inlet channel (2) is used for inflating the cavities (8), and the front ends of the cavities (8) are sequentially communicated with one ends of the gas outlet channel (3), the first gas outlet channel (4), the second gas outlet channel (5) and the third gas outlet channel (6) so that gas in the cavities (8) can be exhausted or exhausted into the workpieces to be detected.

2. The pneumatic control valve according to claim 1, wherein: the control valve (7) comprises a cylinder (71), a valve body (72) which is positioned at the lower side of the cylinder (71) and fixed on the base (1), a piston rod (73) which is positioned in the valve body (72) and connected with the driving end of the cylinder (71), a plugging head (74) for plugging the air inlet channel (2) and a fixing piece (75) for linking the piston rod (73) with the plugging head (74).

3. The pneumatic control valve according to claim 2, wherein: the outer edge (21) of one end of the air inlet channel (2) communicated with the four cavities (8) protrudes out of the upper end of the base (1), and the outer edge (21) is located right below the plugging head (74).

4. A pneumatic control valve as claimed in claim 3, wherein: a first sealing structure (76) is arranged between the valve body (72) and the piston rod (73), the first sealing structure (76) comprises a first sealing ring (761) used for sealing a space between the valve body and the piston rod and a first annular groove (762) arranged on the outer surface of the piston rod (73) and used for placing the first sealing ring (761), and the valve body (72) and the first annular groove (762) are clamped in a bidirectional mode to the first sealing ring (761).

5. The pneumatic control valve according to claim 4, wherein: the valve body is characterized in that a second sealing structure (77) is arranged between the lower end of the valve body (72) and the base (1), the second sealing structure (77) comprises a second sealing ring (771) used for sealing a space between the valve body (72) and the base (1) and a second annular groove (772) arranged at the lower end of the valve body (72) and used for placing the second sealing ring (771), and the valve body (72) and the base (1) are clamped in a bidirectional mode to the second sealing ring (771).

6. The pneumatic control valve according to claim 2 or 5, characterized in that: the fixing piece (75) is further provided with a third sealing ring (751) used for clamping the piston rod (73) at the upper end of the fixing piece (75) and a third annular groove (752) capable of placing the third sealing ring (751).